Gustave schlueter



- finitr d gluin GUSTAVE SGHLUETER, OF BROOKLYNQNEW YORK.

Letters Patent No. 99,355, da ted February 1, 1870.

IMPROVEMENT IN COMPOSITIONS FOR MOUIIDING PROD/I PLASTER OI PARIS.

The Schedule referred to in mm Letters Patent and making part out. l me,

To all whom it may concern.-

Be it known that I, GUSTAVE ScHLUn'rER, of Brooklyn, Kings county, State of New York, have invented a newand useful Improvement in Ornamenting and Coloring Plastcr-of-Paris and other Cements and I do hereby declare that the following is a full,

clean-and exact description thereof, which will enable others skilled in the art to make and use the same: I

The object of this improvement is to impart "ornamental colors to plaster of Paris, so that when mixed with water, in the usual manner, the colored ornamented plaster may be cast or moulded into any desired form. The improved article produced, as hereiuaiter described,I denominate illuminated plaster.

Onemet-hod of carrying out my invention, is to take, of the ordinary dry ground plaster of Paris, about eight (8) ounces, with which I mix about one ounce .of any desired dry coloring-matter, andone-eighth of an ounceof finely-pulverized gum-arabic.

Thegum and coloring-matter are to be thoroughly incorporated with the plaster, after which water is added, in such quantity as may be requisite to give to the mixture the desired consistency for casting or moulding, which is done in the usual well-known manner. Articles thus moulded or cast, will present the ornamental color originally imparted to the dry plaster; and as the coloring-matter is incorporated with the entire body of the article, the color cannot fade or be destroyed by use or abrasion.

The surfaces of articles composed of my improved I illuminated plaster may be. readily polished, by rubbing with a woollen cloth or other suitable fabric.

Any of the ordinary painters drycolors, such as ochre,

- vermillion, umber, sienna, nltramarine, or bronze-powders, may be employed.

I prefer the use of gum-arabic, in the manner I have described, because I find that it hardens and toughens the plaster-Bf Paris, but other gums and adhesive substauces, such as glue and gelatine, may be employed.

Ido not limit myself to the precise proportions of the ingredients herein mentioned, nor to the precise order or method of mixing them, as these may be varied in many ways, without departing from. my invention.

For example, the coloring-matter and the gum, or either of them, may be mixed with water, and the mixture then incorporated with the plaster.

Having thus described my invention,

I claim the following, -and desire to secure the same by Iietters'Patent:

1. Combining the dry gum or adhesive matter with the dry-plaster and coloring-matter, substantially as herein described.

2. As an article of manufacture, a composition,

formed of plaster, gum, and coloring-matter, in the proportions specified, and for the purpose setforth.

The abovespecification of my invention signed by me, this 21st day of October, 1869.

Witnesses: GUSTAVE SOHLUETER,

ALEX. F. Bearers, FRANK BLocKLnY. 

